iOS 7 to Let Developers Detect Blinking and Smiling in Photos
In iOS 7 beta 2, Apple has added new photo detecters that can detect certain facial expressions like blinking and smiling. In iOS 5, the APIs did provide basic facial recognition, and soon after Apple implemented face detection in the stock Camera app.
It could be a possibility that the same situation is happening again and these APIs are foreshadowing new features being rolled out to the Camera app. Apple usually waits until a new generation iPhone is unveiled before announcing new camera features. For instance the iPhone 3G brought geotagging, 3GS brought recording, and the iPhone 5 brought panorama feature.
If implemented, these new blinking and smiling features would fit nice with an iPhone 5S that packs a dual led flash and a higher mega-pixel camera.